[llvm] [RISCV][MCA] Pick the correct VPseudo sched class for indexed memory operation (PR #128978)

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

> MC/MCA support in RVV's LLVM doc of implementation details, it is becoming more and more complicated. WDYT? cc @mshockwave @luke957 @michaelmaitland

Yeah I agree. I'll do that next week

https://github.com/llvm/llvm-project/pull/128978